Answer: is 65292
1.Three pairs of digit sum up to 11
So.5+6,4+7,3+8,2+9
So, password must consist of 2 to 9 numbers to make a pair 11.
No 0 or 1.
2.Also it has only 5 digit. So any two number must be same.
3. as per other condition.. 1st and last digit can't be same and also 3 middle digits can't have 2 same number.
4. Last and first digit can be
6___2
9___3
No other options suit for three times the last digit.
5. For middle numbers..
_529_ is the only option and 2 is a repeator that can make third pair as sum of 11.
_63(11)_ error and also 6 is a repeator but it can't make sum as 11.. Anyway error case.
_74(12)_error also no repeators
So.. Now from step 4 and 5..
65292 is the password.
It helps u practice what ur doing in school.
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